Storage-battery terminal



E. F. A NDREAE.

STORAGE BATTERY TERMINAL. APPLICATIQN FILED SEPT. 4, 1916.

1,420,675 Patehted June 27, 1922.

- ,Q I 7 a .jmuemfoz gg zl/a (1H Maw 3 usually leaden, that is havea large 45 when attempt UNITED A m EDWARD ANDREAE, OF

NEWARK, NEW JERSEY, ASSIGNOR '10 GENERAL LE BATTERIES COMPANY, A CORPORATION OF DELAWARE. v

STORAGE-BATTERY Trimmer.

following is a specifi- This invention relates to detachable con- .10 nectio'ns whichare particularly adapted for use in connection with storage batteries al-.

though it, may have other uses.

In the usual construction of storage batteries, a number of plates of one polarity is usually connected together and to a post or terminal through which electrical connection with the plates is made. This post or terminal extends through the cover of the 1 jar or receptacle in which the plates and electrolyte of the battery are contained It is desirable that this cover should be fluid tight and consequently the joint where the tenninalpasses through the cover, should be made liquid and gas tight. A gasket may be placed against a shoulder on this terminal and a nut: placed upon the other side of the cover may serve to force the cover against the 'asketso as to seal the joint.

' T e' terminals .of storage batteries, are

ercentage of lead: in their composition. here a.

. nut is screw threaded upon a terminal, the

slope of the threads must be made within narrow limits in order tosecure successful I operation, if in fact this can be attained-um der' all circumstances by means of screw threads. The reason for this is that the lead being a soft metal, if the slope of the threads is made so small that the nut will remain 40 .tight after it has been screwed up, then the angular engagement of the threaded surfaces is suchthat it is likely that sufiicient force gwill be exerted to cause. the metal ofi the nut and screw to stick together so that is made to unscrew the nut, the arts are liable to be mutilated. This sticking together of the metal of the nut and 1 terminal may be prevented by reducing the pressure square inch between the engaging surfaces'below a certain value. It is 'not feasible however, to indefinitely increase the engaging surfaces of screw threads. For this/reasonit becomes necessary to limit the slope of the threads in order to prevent the 5 exceeding of the allowable limit of pressure Storage-Battery Tea.

slope within certain nut will stay -tight.

- prevent Specification of Letters Patent. Patented June 27, 1922, Application filed- September 4, 1918. Serial No; 252,525.

per square inch between the engaging surfaces. It 151 one object of the present invention to so .construct the engagin urfaces s wherebythe clamping effect of the, connection is such that the slope of these surfaces may be made any that is desired without danger .of causingthe metal, particularly leaden metal, of the clampin means and terminals from sticking toge er. This is accomplished by providing cam surfaces upon the terminal post which may be made of varying length or depth so.- as to vary. I

the pressure per square inch.v In this way the pressure per square'inch may be brought within any desired limits regardless of. the slope of the cam surfaces. Y

It was-further observed above that with a nut in screw threaded engagement with the terminal post,,the thread must have its It is a further object of the present invention to provide a terminal connection whereby the clamping means will remain in clamping position after it has been set up regardlem of the slope of the ca'mming surfaces. This is accomplished by making the ramming surfaces-of any desired inclination and providing a suitable locking means to unclamping of the device.

the contacting surface and thereby regulate r limits in order that the A further object of the invention is to provide a terminal wherein the objects as stated above are combined.

Other and ancillary objects of the invention will appeal-hereinafter. A

In the accompanying .-drawings which illustrate the invention,

Figure 1 is a vertical central section of a terminal connection showing the same in clamping position upon a stora e battery;

Fig. 2-is a perspective view- 0 the terminal post;

Fig. 3 is a perspective'view of the clamping means for engaging with the terminal P 1 for-,thestorage' battery plates and elec- .1. e drawings, the receptacle ig. 4 1s a perspective view of a locking 7 ,joint around its the plate 5 to .battery plates are secured in a well known trolyte, has a cover. 2 forming an airtight periphery with the walls of the receptacle.

which is formed integral with whichthe shanks as 6 of the or terminal 4 mannen. Theplate 5 and-the post or stud 4 are usually of antimonious' lead such as is used for forming the grids of pasted type storage battery plates and is cast integral with the plate 5. The terminal4 has formed upon ita shoulder 7 and also has projecting from-itthe projections 8 and 9, the lower faces 10 and 11 of which are inclined cir-- cumferentially of the post 14, the small end of the projections 8 being at 12 and the large end at 13, while the small end of the projection 9' is at 14 and the large end at 15, the surfaces 10- and 11 thus forming cam surfaces engaging'with a clamping ,or.se-

.segments 17 and 18 recesses 27 and 28 as the ring 16 is pushed curing means as will a ring 16 of leaden material, from the 'interior of which project the projections 17 and 18; The upper faces 27, a similar recess 28 being between theirother ends on the opposite side of the terminal. The recesses and cam projectionsreferred to are of "such proportions that the may passthrough the longitudinallyalong the post. By turning ends of the projections 17 an respectively under the small ends of the segthe ring 16 in a clockwise direction looking at the top endof the terminal (post, the small 18 will enter mental rejections 8 and 9 on the terminal post. still further turning of the ring will cause it to be cammed longitudinally of the post because of the engagement of the inclined surface 19 with the inclined surface 10, also the engagement of the inclined surface 20 with the inclined surface 11. facilitate the turning of the ring 16, projections 29 and 30 may be 'formed to extend outward radially from its circumference and form finger holdsfor the hand of the operator. The ring may be turned until the recesses 25 and 26 are respectively in registry with the recesses 27 and 28 between the segments on the terminal post, or, in other words, until the segments 17 and 18 on the securing 'ring are in line the terminal In the cover 2. is a hole' 3 through which projects the leaden post now be referred to.- This clamping or securing means comprlses 19 and 20 of these projections are inclined circumferentially of .ring 16 in its securing position.

fparting from its spirit post. Reverse turning of the ring may then be prevented by means of the locking device as shown in Fig. 4, which comprises a ring 31 from which'extend the projections 32 and 33 having segmental sections. The

recesses 25, '26, 27 and 28 having been broughtinto alignment as specified, the ring 31 is threaded over the end of the terminal by turning the ring 16 in a counter-clockwise direction as viewed from the topend of the terminal post. When thesegments 19 and 20'on the. ring 16 have come into registry with the recesses 27 and 28 between the segmental projections on the terminal post, the ring 16 can be moved longitudinally of the terminal and removed therefrom. f

In assembling the connection, the rubber gasket 34 is threaded over the terminal 0st 4 and placed in position upon the shou der 7. The" terminal post through the hole 3. The shown in Fig. 3 is then threaded on over the terminal post, its cam'projections passing between the cam projections on the terminal post." The cam projections uponvthe securing ring having passed below the projections'on the, terminal post, 'the ring 16 is;turned in a clockwise direction viewed securing means as from the top ofthe terminal post, when the ring will be ,cammed longitudinally of the post and the cover 2 forced firmly upon the gasket 34 so that afluid tight joint is formed. When the in a clockwise direction sufficiently to produce the desired result, it may be locked in this position by means of-the device as shown in Fig. 4, the ring 31 of this device being placed to encircle the terminal post while the-segmental projections 32 and 33 pass trough the spaces between the segmental pro ections 8 and 9 and also between the projections 17 and 18, thus locking the To' disconnect the device, the securin shown in Fig. 4, is ing it off of the terminal post, the ring19 is turned in the opposite of the securing direction until it is in such position that its segmental projections may pass between those on the terminal post when the ring 16 may also be lifted off. i

While the invention has been illustrated in'what is considered its best application, it may have other embodiments without deand is not therefore limited to the structure mgs.

ring 16 has-been turned.

is then entered ring as removed by simply lift-.1

shown in the draw- What I claim is- 1. In a detachable connection for a terminal and cover, the combination with a leaden terminal having a flange and segmental cam surfaces, a cover having an opening through which the terminal passes, a secu ring means comprising a ring having segmental cam surfaces engaging theafore said cam, surfaces whereby said ring is forced longitudinally of the terminal toward said cover as it is turned, whereby said cover is clamped between said ring and flange, and means for locking said ring in securing position. v p

2. In a detachable connection for a terminal and cover, the combination with a leaden terminal having a flange and segmental cam surfaces, a cover having an opening through which the terminal passes, a securmg means comprising a ring having segmental cam surfaces engaging the aforesaid cam surfaces whereby said ring is forced longitudinally of the terminal as it is turned, said ring also having radial projections from its periphery to aflord finger holds for turning said ring, a gasket between-said shoulder and ring, and means for locking said ring in securing position.

3'. In a detachable connection for a terminal and cover, the combination with a. leaden terminal having a flange and segmental cam surfaces projecting from the sides of said terminal, a cover having an opening through which the terminal passes, a securing means comprising a ringhaving' segmental cam surfaces projecting from the interipr of said ring and engaging the aforesaid cam surfaces whereby said ring is forced longitudinally of the terminal as it is turned and .7 means extending between the cam projections on the'terminal and the cam projections on said ring for locking said ring in securing position.

4. In a terminal and cover, the combination with detachable connection for a whereby said ring is forced longitudinally of the terminal as it is turned and means for, locking said ring .in position compris ing a ring encircling said post and having segmental projections extending longitudi- I nally of the terminal and between the cam projections on the terminal and vthe cam projections on thelast mentioned ring.

5. A detachable connection for electrical apparatus comprising in combination a post having a flange and segmental cam sur-.

faces and a clamping means comprising a ring having segmental cam surfaces en,- gaging the aforesaid cam surfaces whereby said ring is forced longitudinally of the terminal as it is. turned and means for look: ing said ring in clamping p0sition.

6. A' detachable connection for electrical apparatus comprising in combination a leaden post having a flange and segmental cam surfaces pro ecting nom its sides, a

clamping means comprising a leaden ring having segmental cam surfaces projecting leaden terminal having a flange and segmental cam surfacesprojecting' from the from its interior and engaging'the aforesaid cam surfaces whereby said ring 's forced" longitudinally of the terminal as t is turned and means for lockingsaid mug in clamping position comprising a ring encircling said post and having segmental projections ex-. tending longitudinally of saidpost and between the cam projections on the terminal and the cam projections on the last men-' tioned ring.

In testimony whereof I have signed this specification this 28th day [of August, 1918.-

EDWARD FyANDR-EAE. 

